lma.summary: Produces a summary of results

In pleLMA: Pseudo-Likelihood Estimation of Log-Multiplicative Association Models

Description

This utility function creates a summary list with five elements. The first is a 'report' that contains a summary of characteristics of the data, the model specification, convergence information, and fit statistics. The second and third elements complete the model specification and are the trait adjacency matrix ('TraitByTrait') and the item x trait adjacency matrix ('ItemByTrait'), respectively. The fouth element, 'estimates', contains a matrix of item parameters, and the fifth element, 'phi.mat' contains association parameter estimates.

Usage

lma.summary(model.fit)

Arguments

model.fit

A list object from fitting a model to data

Value

results A list with summary information

Examples

#--- 3 items from depression, anxiety and stress scales of
#    the daass for 250 cases
 data(dass)
 inData <- dass[1:250,c("d1", "d2", "d3", "a1","a2","a3","s1","s2","s3")]

#---  log-linear model of independence
 ind <- ple.lma(inData, model.type="independence")
 noquote(lma.summary(ind))

#---   input for uni-dimensional
 inTraitAdj  <- matrix(1, nrow=1, ncol=1)
 inItemTraitAdj <- matrix(1, nrow=9, ncol=1)

#--- rasch family
 r1 <- ple.lma(inData, model.type="rasch", inItemTraitAdj, inTraitAdj)
 lma.summary(r1)
 #--- Or if specific output is desired
 noquote(lma.summary(r1)$report)
 lma.summary(r1)$TraitByTrait
 lma.summary(r1)$ItemByTrait
 lma.summary(r1)$estimates
 lma.summary(r1)$phi


#--- generalized parial credit model
g1 <- ple.lma(inData, model.type="gpcm", inItemTraitAdj, inTraitAdj, tol=1e-03)
lma.summary(g1)$report
lma.summary(g1)$estimates
lma.summary(g1)$phi

#--- nominal response model
n1 <- ple.lma(inData, model.type="nominal", inItemTraitAdj, inTraitAdj, tol=1e-03)
noquote(lma.summary(n1))

pleLMA documentation built on Oct. 6, 2021, 1:08 a.m.